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To compare the incidence of hypotony after oblique and straight sclerotomies in 25-gauge transconjunctival sutureless vitrectomy (TSV). Retrospective, comparative, interventional case series. Two hundred seventy-five eyes of 250 patients. We reviewed 275 consecutive cases of 25-gauge TSV. Oblique incisions were performed on 141 eyes and straight incisions on 134 eyes. On postoperative...
Health literacy represents the cognitive and social skills that determine the motivation and ability of individuals to gain access to, understand, and use information in ways that promote and maintain good health. 1 According to the 2003 International Adult Literacy and Life Skills Survey (IALSS), over 12 million (60%) adult Canadians lack the capacity to obtain, understand, and act on health...
To evaluate the effectiveness of a novel multimedia learning tool (MMLT) for teaching a method of approaching common ophthalmologic presentations. Randomized clinical study. 25 second-year medical students at Queen's University. We evaluated 2 MMLTs pertaining to common ophthalmologic presentations—acute visual loss and cataract—through the use of a randomized clinical study. Subjects were...
To clarify the efficacy of the macular mapping test (MMT) to identify eccentric fixation with preferred retinal loci (PRL). Retrospective observational case series from archived data. Cases with age-related macular degeneration with low vision in both eyes and best corrected visual activity (BCVA) of 20/50 to 20/400 in the better eye. Identification of preferred retinal loci with the Nidek...
To describe the safety and efficacy of very minimal fluence photodynamic therapy (PDT) for chronic central serous chorioretinopathy (CSC). Retrospective case series. Five patients with chronic CSC. Two had previously failed alternative therapies, and one was taking concomitant corticosteroids. Patients were treated with very minimal fluence PDT (12 J/cm 2 , 150 mW/cm 2 , for...
Central corneal thickness (CCT) affects intraocular pressure (IOP) readings; however, CCT influence on topical medication efficacy is unknown. We evaluated the IOP-lowering effect of topical prostaglandin analogues (PGAs) in relation to CCT. Post hoc analysis of a randomized prospective trial. Subjects randomized to a PGA were followed for 24 weeks and were analyzed for relationship between...
To evaluate the efficacy of photodynamic therapy (PDT) for symptomatic circumscribed choroidal hemangioma (CCH). A retrospective case series analysis through chart review of patients with CCH treated by means of PDT. Thirteen patients with circumscribed choroidal hemangioma. Through retrospective charts review, the patients' demographics, clinical features, management, and follow-up data...
The relationship between cataract surgery wait times and rates of surgery was investigated to determine whether wait times correlate with rates of surgery. Cross-sectional study. We collected 2 Ontario registries for cataract surgeries: (i) Cancer Care Ontario wait time registry; and (ii) The Ontario Health Insurance Plan billing records. Both registries were used to determine whether wait...
To determine whether brand-name glaucoma drops differ from generic equivalents in bottle design, viscosity, surface tension, and volume in North America. Experimental study. We studied 5 bottles each of 11 kinds of glaucoma drops. Density-based calculations of drop volume were assessed using 0.1 mg analytic balance. Viscosity was measured using rotational rheometery. Bottle tip diameter was...
To investigate whether occupationally-related phototoxicity can occur from welding. Cross-sectional study. Forty welders from manufacturing enterprise and 40 age-matched nonwelder controls. Participants underwent thorough ophthalmologic examination including fundus photography, automatic perimeter examination, and high definition optical coherence tomography (OCT) scan. The clinical history...
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